[PATCH 27/27] HID: wacom: leds: handle Cintiq 24HD leds buttons

Benjamin Tissoires
2016-07-05T14:41:46Z

The 24HD has 1 button per LED (first three buttons of each group).
We need a special treatment for them as it's not a uniq button that
switches between the LEDs.

Signed-off-by: Benjamin Tissoires <benjamin.tissoires@redhat.com>
---
drivers/hid/wacom_wac.c | 36 ++++++++++++++++++++++++++++++++++++
1 file changed, 36 insertions(+)

diff --git a/drivers/hid/wacom_wac.c b/drivers/hid/wacom_wac.c
index a2b9c09..fcf2264 100644
--- a/drivers/hid/wacom_wac.c
+++ b/drivers/hid/wacom_wac.c
@@ -2764,6 +2764,31 @@ static void wacom_setup_numbered_buttons(struct input_dev *input_dev,
__set_bit(BTN_BASE + (i-16), input_dev->keybit);
}

+static void wacom_24hd_update_leds(struct wacom *wacom, int mask, int group)
+{
+ struct wacom_led *led;
+ int i;
+ bool updated = false;
+
+ if (group > 0)
+ mask >>= 8;
+
+ for (i = 0; i < 3; i++) {
+ led = wacom_led_find(wacom, group, i);
+ if (!led) {
+ hid_err(wacom->hdev, "can't find LED %d in group %d\n",
+ i, group);
+ continue;
+ }
+ if (!updated && mask & BIT(i)) {
+ led->held = true;
+ led_trigger_event(&led->trigger, LED_FULL);
+ } else {
+ led->held = false;
+ }
+ }
+}
+
static bool wacom_is_led_toggled(struct wacom *wacom, int button_count,
int mask, int group)
{
@@ -2781,7 +2806,11 @@ static void wacom_update_led(struct wacom *wacom, int button_count, int mask,
int cur;
bool pressed;

+ if (wacom->wacom_wac.features.type == WACOM_24HD)
+ return wacom_24hd_update_leds(wacom, mask, group);
+
pressed = wacom_is_led_toggled(wacom, button_count, mask, group);
+
cur = wacom->led.groups[group].select;

led = wacom_led_find(wacom, group, cur);
@@ -2808,6 +2837,13 @@ static void wacom_update_led(struct wacom *wacom, int button_count, int mask,
if (next_led == led)
return;

+ pr_err("%s group: %d led: (%d -> %d) t: %s %s:%d\n", __func__,
+ led->group,
+ led->id,
+ next_led->id,
+ next_led->trigger.name,
+ __FILE__, __LINE__);
+
next_led->held = true;
led_trigger_event(&next_led->trigger,
wacom_leds_brightness_get(next_led));
--
2.5.5